Barred Rock/Ameraucauna mix -- idea of sexing?

[ecwetzel]

Any ideas what this little thing may be at 7 weeks? The roo is a barred rock and the mom an ameraucauna.

We also have two other siblings that look like barred rocks. Same age. One is already starting to form wattles and a bigger comb, so I assume a rooster? The other has a muff, so I'm assuming it is mixed with something else (we hatched eggs from a friend) although I'm not sure what. I think the second is a hen, though? They both were born with white patches on their head. Does the patch-on-head trick still hold when the dad is the barred rock?

 

[Gray Farms]

Pea combed birds are harder to tell when they are young. I wouldn't venture a guess either way at this age. Better wait a few more weeks to be sure.

 

[junebuggena]

Mom was an Easter Egger, not Ameraucana. With the rooster being barred, there is no sexlinking. Too young to be certain of gender. White birds take longer to sex because there are fewer tells.